Index



Jan. 18, 1927.

F. P. GORIN INDEX Filed Oct. 27, 1925 Patented Jan. 18, 1927.

1,614,838 PATENT OFFICE.

FREDERICK P. GORIN, 0F SEATTLE, WASHINGTON.

INDEX.

.Application filed October 27, 1925.

This invention relates to means for indexing bound books, With a vieu7to providing an index which Will be comprehensive in its notation, whichmay be selectively applied as desired, and Which, When 1n place, will besecured against liability of separatlon in use or a tendency to tear theleaf or leaves to which it may be applied.

In providing index means for booksof certain character, as laW books andtechnical publications, the ordinary alphabetical 1ndex is of little orno service and the index notations must of necessity be sufficientlylcomprehensive to indicate, for example,

chapterl divisions or subject divisions, and Under these circumstancesthe index tab per se must be capable of carrying a larger legend than isthe case With the alphabetical 1ndex. Indexes of the particular typereferred to have been heretofore proposed in connection with books ofthis character, but such, Where formed as a part ofa particular leaf orseparately formed and attached to such leaf have proven of little valueas they were readily separated from the leaf 1n use, or when morepermanently att-ached., 'resulted in a tearing of the leaf or leaves 1nopening the book through the use of the index tabs.

The present invention is designed to provide an index tab which willpermit a sufficiently comprehensive index notation and which Will be soattached to the leaf as to render separation therefrom in ordinary usepractically impossible,'and which at the same time Will utilize theindex tab as the means subjected to strain when opening the book Withthe index, thereby avoiding the possibility of tearing the leaf.

The invention is illustrated in the accompanying drawings, in Which: l

Fig. 1 is a broken perspective view ofa book showing several of theindex tabs in position.

Fig. 2 is a broken plan with the book open at one of the index leaves.

Fig. 8 is a section on line 3-3 of Fig.` 2.

The index tab proper, of which of course there may be any desirednumber, comprises a strip of transparent material, as 1, preferablycelluloid or the like, folded upon itself and having a length whenfolded approximating the Width of the leaf 2 of the book, and theadditional projection 3 beyond the free edge of the leaf necessary toprovide a tab proper of the required Width. The strip Serial No. 65,219.

as folded embraces the leaf 2, the free ends of the strip terminatingapproximately adjacent the inner or bound edge of the leali. The stripis secured to the leaf by any suitable transparent adhesive, and thestrip itself is comparatively thin.

Thatportion of the strip which vextends beyond the free edge of the leafis thus formed of upper and lower sections defining a space closed atthe inner-end by the edge of the leaf 2 and at the outer end by the foldor bend in the strip l. This space is designed to receive the indexnotation, and such may be formed on a fabric section 4 printed on bothsides with the desired index notation and cemented in place so that thefabric section is securely held as a fixed part of the index tab and thenotation thereon is clearly visible through the transparent stripproper. Obviously the sect-ion 4' ma;1 he constructed of any appropriatematerial. as paper or the like, it being apparent that the strip 1completely protects the strip 4 and also prevents the notation on thestrip 4 from becoming blurred or obliterated through continued use.

Of course the index strips described arc to be applied in appropriatenumber, that is to say, if the respective chapters of tlhe book form theindex basis, there will be an index tab at the first page of eachchapter. The printed matter of the -leaf to which the index tab isapplied is of course readily legible through the transparent strip 1,and as thev l latter is quite thin, say for example` two thousandths ofan inch :in thickness. it is apparent that the strip when applied addsto the particular leaf double this thickness or four thousandths, whichis of course a negligible matter of importance, in so far as increasingthe thickness of the book is concerned. VAs the index tabs for the hookare necessarily in staggered or offset relation, the book is increasedin thickness only to the extent of one of such tabs, which does notappreciably increase the thickness of the book. If the index of the bookrequires more than one set of oHset tabs, the book thickness Will be ofcourse increased by thc aggregate thickness of the underlying or alignedtabs, but even to this extent the ordinary uses of the book both in thespace occupied in the book case and its appearance when closed will notbe appreciably changed by the use of the tabs.

The important characteristic of the improved tab is, however, incidentalto the fact that while it may be independently ap plied to any book orbooks, it is when applied an actual reinforce to the book rather than anaid in destroying the book as have been similar tabs as previouslydeveloped. 1n the first place, it is to be noted that the tab is securedacross the width of the leaf, and on both sides thereof, and in thesecondV place, the free end of the index tab strip is formed by a bendin the strip, that is, is closed. Thus the tendency to open the book atthe desired point by lifting the superimposed leaves by pulling orraising the selected index tab, will not, in any degree, place anyunusual strain upon the leaf to which the tab is attached, for thestrain on the tab is extended throughout the full width of the leaf andis borne by the tab proper on the upper and lower sides of the leaf. lfthe tab were a single strip applied to by one side of the leaf, it isapparent that the attempt to lift the leaves by the selected tab wouldexert a leverage upon the connection of such tab and leaf and tend toeither strip the tab from the leaf or tear the leaf at its connectionwith the tab. These disadvantages are entirely overcome by the presentarrangement as there is no possibility of stripping the tab from theleaf and the strain of lifting the leaves of the book is borne directlybythe opposing sides of the tab strip, and this is secured to theopposing `sides of the particular leaf substantially throughout the fullwidth of the latter. It is of course to be understood that theprojection of the strip beyond the edge of the leaf is of sufficientwidth to permit the desired index notation, and if this notation is tobe in the particular instance unusually comprehensive, the width of thetab may be increased to permit the printing of several lines on thestrip included between the projected portions of the tab strip. There isof course no limitation in this respect, as it is intended that theimproved tabs 4shall be made up for application to the book after thesame has been prin-ted, and each tab will therefore be constructed witha particular view to the nature and character of the index legend it isto carry.

l. The combination with a bound book of an index tabfto be secured to aleaf of the book, said tab comprising a strip of material extendedacross said leaf on both surfaces thereof and projected beyond the freeedge of the leaf to provide a tab receiving section, the ends of thestrip being .secured to the leafimmediately-adjacent the bound edge ofthe leaf whereby any strain on the index tab is transmitted to the leafat a point adjacent the bound edge thereof to avoid mutilating the leaf.

i2. The combination with a bound book of an index tab thereforcomprising a` strip folded upon itself with the folded edge positionedbeyond the free edge of the leaf and the sections of the strip inwardlyof the folded edge extended across the respective surfaces of the leafto a point adjacent the bound edge of Isuch leaf, the free ends of thestrip beingsecured tothe leaf immediately adjacent the bound edge of thelatter, that portion of the strip beyond the free edge of the leaf beingdesigned to receive an index indication. Y

3. The combination with a bound book of an'index tab therefor comprisinga transparent strip folded upon itself with the folded edge positionedbeyond the free edge of the leaf and the sections of the strip inwardlyof Ithe folded edge extended across the respective surfaces of the leafto a point adjacent the bound edge of such leal, the fr-ee ends of thestrip being secured to the leaf immediately adjacent the bound edge ofthe latter, that portion of the strip beyond the free edge of the leafbeing designed to receive an index indication.

In testimony whereof I affix my signature.

FREDERICK l). GORIN.

CII

